Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6025c12893ea81d…

MALICIOUS

PDF

41.8 KB Created: 2020-08-19 16:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bafc3f248fd15e35885db3a1ae9f368a SHA-1: 887bb083bb31843a6281d978ea11097e0374db2d SHA-256: f6025c12893ea81d0e660163b6145dfd955f34ac76e9d6c079d75babb586dbfc
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, a technique often used for SEO poisoning or to obscure malicious destinations. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=clear+acrylic+sheet+melbourne'. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but repeats the keyword 'clear acrylic sheet melbourne' and the malicious URL, suggesting a lure for users searching for such products.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=clear+acrylic+sheet+melbourne
    • http://files.jmn-i.com/uploads/1/3/0/8/130814642/badegumun-vafadivo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8140/8420/files/13047920466.pdf
    • https://cdn.shopify.com/s/files/1/0431/2439/2087/files/gun_mayhem_2_hacked.pdf
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/71141646720.pdf
    • https://cdn.shopify.com/s/files/1/0428/7981/1750/files/22220929924.pdf
    • https://cdn.shopify.com/s/files/1/0433/5435/7910/files/15343935483.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/74535711799.pdf
    • https://cdn.shopify.com/s/files/1/0429/6101/0842/files/duvitalut.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2676/files/31515254141.pdf
    • https://cdn.shopify.com/s/files/1/0428/0641/1431/files/69784791389.pdf
    • https://cdn.shopify.com/s/files/1/0430/7035/7661/files/you_can_t_hurt_me.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006499.bin
f21ef33540e4fadd685584ec72d7c67b7dbfcbb662012d0b1d64a9f8e6d35be6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6499 5188 bytes
font_01_sfnt_off00007615.bin
459febe65c155f4dbe370c11b1a65b7ec78b7dd5074ccba18c021cc1d4d5c551		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7615 10760 bytes

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